If the researchers are successful, they ______ an important step in reproducing the way that humans use cognition（认识力）to interact（交流；互动）in their world．

试卷相关题目

• 1— Has Tim started? He said he would join in the party. — He ____．He is a man of keeping his word.

  A.could have left

  B.must have left

  C.can't come

  D.won't be coming

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• 2----- __________it be Li Ping who broke the glass? ---- No. It __________ be Wu Dong who did it.

  A.Could; may

  B.Can; must

  C.May; must

  D.Can; can

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• 3He did all he could to try to get the car to start, but it ______ work.

  A.wouldn't

  B.didn't

  C.shouldn't

  D.shan't

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• 4---Must I see a doctor right now? ----No, you______see a doctor for the time being.

  A.can't

  B.shouldn't

  C.needn't

  D.mustn't

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• 5-- If only I _______ the teachers instructions, in which case I ______ not so unlucky now. -- It's high time that you _______ yourself.

  A.followed; am; should reflect

  B.had followed; would have been; reflected

  C.would follow; would be; reflect

  D.had followed; would be; reflected

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• 6The recommendation he gave me is that I ____ more traveling to open my eyes.

  A.will do

  B.could do

  C.should do

  D.must do

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• 7I____ asleep because it took me a long time to realize that the telephone was ringing.

  A.could have fallen

  B.should have fallen

  C.must have fallen

  D.mustn't have fallen

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• 8I was so young.  You ________ better than to rely on me

  A.should have known

  B.should know

  C.must know

  D.must have known

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• 9---- Where is Jack? ----He _________ football on the playground with those AFS students, but I am not sure.

  A.must be playing

  B.must have played

  C.may be playing

  D.may have played

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• 10.He _____have solved all his problems; otherwise, he wouldn't be so relaxed.

  A.should

  B.must

  C.wouldn't

  D.can't

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